Reddish-violet monoazo dye for wool



Ho Drawing.

To all whom it may cameo m:

Be it known that I, HUGO SGHWEITZER, citizen of the German Empire, residing at Leverkusei'i near Cologne, Germany, have invented new and useful Improvements in Reddish-Violet Monoezo Dyes for Wool (for which I have filed applica-isioiie in Germany. Feb. 19, 1916, Patent Number 298,482; Austria, Feb. 5, 1917, Patent Nimiber 87,334; Switzerland, June 3, 1920, Pa ent Number 88,562; France, May 12, 1920, Patent Number 515,442; and in England, May 6, 1920, Patent Number 164,218), of which the following is a specification.

I have found that new and valuable ezodyes can he obtained by combining diezo compounds of -iiiimnilin-2-sulfemids hem ing most, probably the following general formula.

f may whim thyleminesulfonic acid compound, such as 2 naphthylemine 8 sulfonic acid, Qmephthylamine-68-disulfonic acid, orthe anisy Q-naphthylemine-8-sulfonic ecio.

My new dyes in the form of their sales with alkali. metals after being dried and puivcrized are dark powders soluble in water generally with a red to violet and in concentrated sulfuric acid with an oreg ge-red coloration. Upon reduction with tin and hydrochloric acid a perephenyiendiemin .cleiivative heaving most probably the for mule:

,2,- U;N Rn Hi-"2% KQ-NH3 and a 1.2- iieininon.e.phthelenesu1fonie eci. compound are obtained. 'JChey dye wool from acid bei-he even, from "so vioiei', shades fast to light end! falling.

Application flee? August ing dried and pulv rizeei it cler soluble in concentrate em: an orange-rec} celei'e-iioii. Upeii'zbre mug i with tin and hydrochloric e cisl it up imbo 1.4-dieminohezmeee--ei ylpli cylsuliemid and lfi-zliemiiionephthelene-S-eulionic ecicl. It clyes wool i 'mm acid befih IQddlSikVlOlfiilshades feet to ligl'ii encl ing. @thei' of above mezetioneel nitrenilinsulfemicle can he use, such nitranilin-2 suifenilid, i-liihif2i1lii phenylaniicl, i-HitFeIiiIin-Qeulfmee or -nitreniliii fieulfdimefiliylemie.

I claim: i. The herein dese'si which, in %he form o veiized salts with all:

.wders soluble in WEiIE d to violet and iii witan orange 1 upen. reciu oi'ic acifi. suhsituto .ih-insulfemid and e ili -d.'1 if?1i(3 acid iifimifimlilii." wo l from red to vicle z shades Hing? eei-eoemiielly me he, m clesczibetl new ing in a free state most Probably the following formula: v

sombeing in the form of its dried and pulverized sodium salt a dark powder soluble in concentratedsulfuric acid with an orangerod coloration; yielding upon reduction with tin and hydrochloric acid 1.4-diaminobenzene 2-ethy1phenylsii1famid and 1.2- diaminonaphthalene 8 sulfonic acid, and dyeing wool from acid baths reddish-vioiet shades fast to light and fuiling, snbstantially as described.

In testimony whereof I have hereunto-set my hand in the presence oftwo subscribing 

